HOME TheInfoList.com
Providing Lists of Related Topics to Help You Find Great Stuff
[::MainTopicLength::#1500] [::ListTopicLength::#1000] [::ListLength::#15] [::ListAdRepeat::#3]

picture info

Alluvium
ALLUVIUM (from the Latin
Latin
alluvius, from alluere, "to wash against") is loose, unconsolidated (not cemented together into a solid rock ) soil or sediments , which has been eroded , reshaped by water in some form, and redeposited in a non-marine setting. Alluvium
Alluvium
is typically made up of a variety of materials, including fine particles of silt and clay and larger particles of sand and gravel . When this loose alluvial material is deposited or cemented into a lithological unit, or lithified , it is called an ALLUVIAL DEPOSIT. CONTENTS * 1 Definitions * 2 Age * 3 Ores * 4 See also * 5 References * 6 External links DEFINITIONSThe term "alluvium" is not typically used in situations where the formation of the sediment can clearly be attributed to another geologic process that is well described
[...More...]

"Alluvium" on:
Wikipedia
Google
Yahoo

picture info

Quaternary
QUATERNARY ( /kwəˈtɜːrnəri/ ) is the current and most recent of the three periods of the Cenozoic
Cenozoic
Era in the geologic time scale of the International Commission on Stratigraphy (ICS). It follows the Neogene
Neogene
Period and spans from 2.588 ± 0.005 million years ago to the present. The Quaternary
Quaternary
Period is divided into two epochs: the Pleistocene
Pleistocene
(2.588 million years ago to 11.7 thousand years ago) and the Holocene
Holocene
(11.7 thousand years ago to today). The informal term "Late Quaternary" refers to the past 0.5–1.0 million years. The Quaternary
Quaternary
Period is typically defined by the cyclic growth and decay of continental ice sheets driven by Milankovitch cycles and the associated climate and environmental changes that occurred
[...More...]

"Quaternary" on:
Wikipedia
Google
Yahoo

picture info

Bedrock
In geology , BEDROCK is the lithified rock that lies under a loose softer material called regolith at the surface of the Earth or other terrestrial planets . The broken and weathered regolith includes soil and subsoil . The surface of the bedrock beneath the soil cover is known as ROCKHEAD in engineering geology , and its identification by digging, drilling or geophysical methods is an important task in most civil engineering projects. Superficial deposits (also known as drift ) can be extremely thick, such that the bedrock lies hundreds of meters below the surface. Bedrock
Bedrock
may also experience subsurface weathering at its upper boundary, forming saprolite . A solid geologic map of an area will usually show the distribution of differing bedrock types, rock that would be exposed at the surface if all soil or other superficial deposits were removed
[...More...]

"Bedrock" on:
Wikipedia
Google
Yahoo

picture info

Sedimentary Basin
SEDIMENTARY BASINS are regions of Earth
Earth
of long-term subsidence creating accommodation space for infilling by sediments . The subsidence can result from a variety of causes that include: the thinning of underlying crust , sedimentary, volcanic, and tectonic loading, and changes in the thickness or density of adjacent lithosphere . Sedimentary basins occur in diverse geological settings usually associated with plate tectonic activity. Basins are classified structurally in various ways, with a primary classifications distinguishing among basins formed in various plate tectonic regime (divergent, convergent, transform, intraplate), the proximity of the basin to the active plate margins, and whether oceanic , continental or transitional crust underlies the basin
[...More...]

"Sedimentary Basin" on:
Wikipedia
Google
Yahoo

Alluvial (horse)
ALLUVIAL (foaled 1969 in Kentucky
Kentucky
) was an American Thoroughbred broodmare . BACKGROUNDAlluvial was sired by U.S. Racing Hall of Fame inductee Buckpasser , who in turn was sired by the 1953 United States
United States
Horse of the Year , Tom Fool , out of the Hill Prince mare Bayou. Alluvial was a half-sister, through Bayou, to the graded stakes race winning filly Batteur, who won the Santa Monica Handicap , Santa Margarita Handicap , Santa Maria Handicap , and Santa Barbara Handicap , as well as the New York Handicap . BREEDING RECORDAlluvial was unraced and is best known not for her racing success as a graded stakes race winner but for her success as a broodmare. She is the dam of Belmont Stakes winner Coastal , by Majestic Prince , and champion Slew o\' Gold , by Seattle Slew
[...More...]

"Alluvial (horse)" on:
Wikipedia
Google
Yahoo

picture info

Glacial Till
TILL or GLACIAL TILL is unsorted glacial sediment. Till
Till
is derived from the erosion and entrainment of material by the moving ice of a glacier . It is deposited some distance down-ice to form terminal , lateral , medial and ground moraines . Till
Till
is classified into primary deposits, laid down directly by glaciers, and secondary deposits, reworked by fluvial transport and other processes. CONTENTS * 1 Processes * 2 Tillite * 3 Types * 4 See also * 5 References PROCESSESGlacial drift is the coarsely graded and extremely heterogeneous sediment of a glacier; till is the part of glacial drift deposited directly by the glacier. Its content may vary from clays to mixtures of clay, sand , gravel , and boulders
[...More...]

"Glacial Till" on:
Wikipedia
Google
Yahoo

Lithification
LITHIFICATION (from the Ancient Greek
Ancient Greek
word lithos meaning 'rock' and the Latin
Latin
-derived suffix -ific) is the process in which sediments compact under pressure , expel connate fluids , and gradually become solid rock. Essentially, lithification is a process of porosity destruction through compaction and cementation . Lithification includes all the processes which convert unconsolidated sediments into sedimentary rocks . Petrifaction , though often used as a synonym, is more specifically used to describe the replacement of organic material by silica in the formation of fossils . SEE ALSO * Diagenesis
Diagenesis
REFERENCES * ^ Monroe, J.S.; Wicander, R.; Hazlett, R.W. (2006). Physical Geology: Exploring the Earth (6th ed.). Belmont: Thomson. pp. 203–204. ISBN 9780495011484 . This geology article is a stub . You can help by expanding it
[...More...]

"Lithification" on:
Wikipedia
Google
Yahoo

picture info

Lake
A LAKE is an area of variable size filled with water, localized in a basin , that is surrounded by land, apart from any river or other outlet that serves to feed or drain the lake. Lakes lie on land and are not part of the ocean , and therefore are distinct from lagoons , and are also larger and deeper than ponds , though there are no official or scientific definitions. Lakes can be contrasted with rivers or streams , which are usually flowing. Most lakes are fed and drained by rivers and streams. Natural lakes are generally found in mountainous areas, rift zones , and areas with ongoing glaciation . Other lakes are found in endorheic basins or along the courses of mature rivers. In some parts of the world there are many lakes because of chaotic drainage patterns left over from the last Ice Age . All lakes are temporary over geologic time scales, as they will slowly fill in with sediments or spill out of the basin containing them
[...More...]

"Lake" on:
Wikipedia
Google
Yahoo

picture info

USGS
The UNITED STATES GEOLOGICAL SURVEY (USGS, formerly simply GEOLOGICAL SURVEY) is a scientific agency of the United States
United States
government . The scientists of the USGS study the landscape of the United States
United States
, its natural resources , and the natural hazards that threaten it. The organization has four major science disciplines, concerning biology , geography , geology , and hydrology . The USGS is a fact-finding research organization with no regulatory responsibility. The USGS is a bureau of the United States
United States
Department of the Interior ; it is that department's sole scientific agency. The USGS employs approximately 8,670 people and is headquartered in Reston , Virginia . The USGS also has major offices near Lakewood , Colorado
Colorado
, at the Denver Federal Center , and Menlo Park , California
California

[...More...]

"USGS" on:
Wikipedia
Google
Yahoo

picture info

Pliocene
The PLIOCENE ( /ˈplaɪəˌsiːn/ ; also PLEIOCENE ) Epoch is the epoch in the geologic timescale that extends from 5.333 million to 2.58 million years BP . It is the second and youngest epoch of the Neogene
Neogene
Period in the Cenozoic Era . The Pliocene
Pliocene
follows the Miocene Epoch and is followed by the Pleistocene
Pleistocene
Epoch. Prior to the 2009 revision of the geologic time scale, which placed the four most recent major glaciations entirely within the Pleistocene, the Pliocene
Pliocene
also included the Gelasian stage, which lasted from 2.588 to 1.806 million years ago, and is now included in the Pleistocene. As with other older geologic periods, the geological strata that define the start and end are well identified but the exact dates of the start and end of the epoch are slightly uncertain
[...More...]

"Pliocene" on:
Wikipedia
Google
Yahoo

picture info

Miocene
The MIOCENE ( /ˈmaɪəˌsiːn/ ) is the first geological epoch of the Neogene
Neogene
Period and extends from about 23.03 to 5.333 million years ago (Ma). The Miocene
Miocene
was named by Sir Charles Lyell
Charles Lyell
. Its name comes from the Greek words μείων (meiōn, “less”) and καινός (kainos, “new”) and means "less recent" because it has 18% fewer modern sea invertebrates than the Pliocene
Pliocene
. The Miocene
Miocene
follows the Oligocene Epoch and is followed by the Pliocene
Pliocene
Epoch. As the earth went from the Oligocene through the Miocene
Miocene
and into the Pliocene, the climate slowly cooled towards a series of ice ages
[...More...]

"Miocene" on:
Wikipedia
Google
Yahoo

picture info

Braided Stream
A BRAIDED RIVER, or BRAIDED CHANNEL, consists of a network of river channels separated by small and often temporary islands called braid bars or, in British usage, aits or eyots. Braided streams occur in rivers with high slope and/or large sediment load. Braided channels are also typical of environments that dramatically decrease channel depth, and consequently channel velocity, such as river deltas , alluvial fans and peneplains . CONTENTS * 1 Formation * 2 Examples * 3 Braided rivers vs anastomosing rivers * 4 See also * 5 References * 6 Further reading * 7 External links FORMATION The White River in the U.S. state
U.S. state
of Washington transports a large sediment load from the Emmons Glacier of Mount Rainier
Mount Rainier
, a young, rapidly eroding volcano
[...More...]

"Braided Stream" on:
Wikipedia
Google
Yahoo

picture info

Alluvial Desert
A DESERT PAVEMENT, also called REG (in the western Sahara), SERIR (eastern Sahara), GIBBER (in Australia), or SAï (central Asia) is a desert surface covered with closely packed, interlocking angular or rounded rock fragments of pebble and cobble size. They typically top alluvial fans . Desert varnish collects on the exposed surface rocks over time. Geologists debate the mechanics of pavement formation and their age. CONTENTS * 1 Formation * 2 Local names * 3 See also * 4 Notes * 5 References * 6 External links FORMATIONSeveral theories have been proposed for the formation of desert pavements. A common theory suggests they form through the gradual removal of sand , dust and other fine-grained material by the wind and intermittent rain, leaving the larger fragments behind
[...More...]

"Alluvial Desert" on:
Wikipedia
Google
Yahoo

picture info

Bay Mud
BAY MUD consists of thick deposits of soft, unconsolidated silty clay , which is saturated with water ; these soil layers are situated at the bottom of certain estuaries , which are normally in temperate regions that have experienced cyclical glacial cycles. Example locations are Cape Cod Bay , Chongming Dongtan Reserve in Shanghai
Shanghai
, China
China
, Banc d\'Arguinpreserve in Mauritania
Mauritania
, The Bristol Channel in the United Kingdom
United Kingdom
, Mandø Island in the Wadden Sea
Wadden Sea
in Denmark
Denmark
, Florida Bay , San Francisco Bay , Bay of Fundy
Bay of Fundy
, Casco Bay , Penobscot Bay , and Morro Bay
[...More...]

"Bay Mud" on:
Wikipedia
Google
Yahoo

picture info

Gemstone
A GEMSTONE (also called a GEM, FINE GEM, JEWEL, PRECIOUS STONE or SEMI-PRECIOUS STONE) is a piece of mineral crystal which, in cut and polished form, is used to make jewelry or other adornments. However, certain rocks (such as lapis lazuli ) or organic materials that are not minerals (such as amber , jet , and pearl ) are also used for jewelry and are therefore often considered to be gemstones as well. Most gemstones are hard, but some soft minerals are used in jewelry because of their luster or other physical properties that have aesthetic value. Rarity is another characteristic that lends value to a gemstone. Apart from jewelry, from earliest antiquity engraved gems and hardstone carvings , such as cups, were major luxury art forms. A gem maker is called a lapidary or gemcutter ; a diamond worker is a diamantaire . The carvings of Carl Fabergé are significant works in this tradition
[...More...]

"Gemstone" on:
Wikipedia
Google
Yahoo

Hydraulic Action
HYDRAULIC ACTION is the EROSION that occurs when the motion of water against a rock surface produces mechanical weathering. Most generally, it is the ability of moving water (flowing or waves) to dislodge and transport rock particles. Within this rubric are a number of specific erosional processes, including abrasion , attrition, corrasion , saltation, and scouring (downcutting ). Hydraulic action is distinguished from other types of water facilitated erosion, such as static erosion where water leaches salts and floats off organic material from unconsolidated sediments, and from chemical erosion more often called chemical weathering . It is a mechanical process, in which the moving water current flows against the banks and bed of a river, thereby removing rock particles. A primary example of hydraulic action is a wave striking a cliff face which compresses the air in cracks of the rocks
[...More...]

"Hydraulic Action" on:
Wikipedia
Google
Yahoo
.